Support structure for supporting flexible display screen, and flexible display screen module

ABSTRACT

A flexible screen support structure includes a first flexible board, a second flexible board, a side board, and a number of electromagnets. The second flexible board is arranged opposite to the first flexible board and defines a gap together with the first flexible board. The gap is filled with an electro-rheological fluid. The side board encloses outer peripheral sides of the first and second flexible boards and seals the gap. The electromagnets are secured to the first flexible board and located in the gap, each electromagnet has a support surface attached to the first flexible board and a side surface at an acute angle to the support surface, and the side surfaces of adjacent electromagnets are mutually attached by a magnetic force to cause the first flexible board to roll up. A flexible display screen module is also provided.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a continuation application of U.S.application Ser. No. 16/303,765, filed Nov. 21, 2018, which is anational phase of International Application No. PCT/CN2017/091266, filedJun. 30, 2017, which is based on and claims a priority to Chinese PatentApplication No. 201610542572.1, filed Jul. 8, 2016. The entiredisclosures of the aforementioned applications are incorporated hereinby reference.

FIELD

The present disclosure relates to a technical field of electronicdevices, and more particularly, to a support structure for supporting aflexible display screen, and a flexible display screen module.

BACKGROUND

With the development of flexible display technology, the flexibledisplay screen is increasingly used in mobile terminals, and a supportstructure is used to realize collapse or expansion of the flexibledisplay screen. At present, most mobile terminals have two kinds ofsupport structures, namely a support structure of a folding mode, and asupport structure of a rolling mode. When the mobile terminal adopts thesupport structure of the folding mode, the flexible display screen isconveniently supported by a board after being expanded, but it is noteasy to reduce the volume after the flexible display screen is folded.When the mobile terminal adopts the support structure of the rollingmode, the flexible display screen can be rolled up with volumeshrinkage, but there is no support structure, which is not conducive tosupporting the flexible display screen after being expanded. Therefore,there is currently no support structure that can facilitate the volumeshrinkage of the flexible display screen and also facilitate the supportof the flexible display screen after being expanded.

SUMMARY

Embodiments of the present disclosure provide a flexible screen supportstructure. The flexible screen support structure includes: a firstflexible board, a second flexible board, a side board and a plurality ofelectromagnets. The first flexible board is configured to be attached toa flexible display screen. The second flexible board is arrangedopposite to the first flexible board. The second flexible board and thefirst flexible board define a gap therebetween, and the gap is filledwith an electro-rheological fluid. The side board encloses outerperipheral sides of the first flexible board and the second flexibleboard and seals the gap. The plurality of electromagnets are secured tothe first flexible board and located in the gap, each electromagnet hasa support surface attached to the first flexible board and a sidesurface at an acute angle to the support surface, and side surfaces ofadjacent electromagnets are able to be attached to each other by amagnetic force to cause the first flexible board to roll up.

Embodiments of the present disclosure further provide a flexible displayscreen module. The flexible display screen module includes a flexiblescreen support structure and a flexible display screen. The flexibledisplay screen includes a first flexible board, a second flexible board,a side board and a plurality of electromagnets. The first flexible boardis configured to be attached to a flexible display screen. The secondflexible board is arranged opposite to the first flexible board. Thesecond flexible board and the first flexible board define a gaptherebetween, and the gap is filled with an electro-rheological fluid.The side board encloses outer peripheral sides of the first flexibleboard and the second flexible board and seals the gap. The plurality ofelectromagnets are secured to the first flexible board and located inthe gap, each electromagnet has a support surface attached to the firstflexible board and a side surface at an acute angle to the supportsurface, and side surfaces of adjacent electromagnets are able to beattached to each other by a magnetic force to cause the first flexibleboard to roll up.

Embodiments of the present disclosure further provide a flexible displayscreen module. The flexible display screen module includes a flexibledisplay screen; a flexible board, a side board and a plurality ofelectromagnets. The flexible board is arranged opposite to the flexibledisplay screen. The flexible board and the flexible display screendefine a gap therebetween, and the gap is filled with anelectro-rheological fluid. The side board encloses outer peripheralsides of the flexible display screen and the flexible board and sealsthe gap. The plurality of electromagnets are secured to the flexibledisplay screen and located in the gap. Each electromagnet has a supportsurface attached to the flexible board and a side surface at an acuteangle to the support surface, and side surfaces of adjacentelectromagnets are able to be attached to each other by a magnetic forceto cause the flexible board to roll up.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to illustrate technical solutions of the present disclosuremore clearly, drawings required in embodiments will be briefly describedbelow. Obviously, the drawings described below only show a part ofembodiments of the present disclosure, and based on these drawings,other drawings can be obtained by those of ordinary skill in the artwithout creative efforts.

FIG. 1 illustrates a schematic view of a support structure forsupporting a flexible display screen according to an embodiment of thepresent disclosure.

FIG. 2 illustrates a bent state of the support structure of FIG. 1.

FIG. 3 illustrates a schematic view of a support structure forsupporting a flexible display screen according to another embodiment ofthe present disclosure.

FIG. 4 illustrates a bent state of the support structure of FIG. 3.

FIG. 5 illustrates a schematic view of a flexible display screen moduleaccording to the present disclosure.

FIG. 6 illustrates a bent state of the flexible display screen module ofFIG. 5.

FIG. 7 illustrates a schematic view of another flexible display screenmodule according to the present disclosure.

FIG. 8 illustrates a bent state of the flexible display screen module ofFIG. 7.

FIG. 9 illustrates a schematic view of a mobile terminal according tothe present disclosure.

DETAILED DESCRIPTION

Technical solutions in embodiments of the present disclosure will bedescribed clearly and completely with reference to the drawings.

The present disclosure relates a support structure for supporting aflexible display screen. The support structure includes: a firstflexible board, a second flexible board, a side board and a plurality ofelectromagnets. The first flexible board is configured to be attached tothe flexible display screen. The second flexible board is arrangedopposite to the first flexible board. The second flexible board and thefirst flexible board defines a gap therebetween, and the gap is filledwith an electro-rheological fluid. The side board encloses outerperipheral sides of the first flexible board and the second flexibleboard and seals the gap. The plurality of electromagnets are secured tothe first flexible board and located in the gap, each electromagnet hasa support surface attached to the first flexible board and a sidesurface at an acute angle to the support surface, and side surfaces ofadjacent electromagnets are able to be attached to each other by amagnetic force to cause the first flexible board to roll up.

The present disclosure relates a flexible display screen module. Theflexible display screen module includes a flexible display screen, afirst flexible board, a second flexible board, a side board and aplurality of electromagnets. The first flexible board has a first outersurface and a first inner surface arranged oppositely, and the flexibledisplay screen is attached to the first outer surface. The secondflexible board is arranged opposite to the first flexible board andspaced apart from the first flexible board, and the first inner surfaceis oriented towards the second flexible board. The side board enclosesouter peripheral sides of the first flexible board and the secondflexible board to cooperatively define a cavity with the first flexibleboard and the second flexible board, and the cavity is filled with anelectro-rheological fluid. The plurality of electromagnets are securedto the first inner surface and located in the cavity. Each electromagnethas a side surface, side surfaces of two adjacent electromagnets definesa clearance therebetween, and the side surfaces of two adjacentelectromagnets being able to be attached to each other by a magneticforce to cause the first flexible board to roll up.

The present disclosure relates another flexible display screen module.The flexible display screen module includes a flexible display screen; aflexible board, a side board and a plurality of electromagnets. Theflexible board is arranged opposite to the flexible display screen. Theflexible board and the flexible display screen defines a gaptherebetween, and the gap is filled with an electro-rheological fluid.The side board encloses outer peripheral sides of the flexible displayscreen and the flexible board and seals the gap. The plurality ofelectromagnets are secured to the flexible display screen and located inthe gap. Each electromagnet has a support surface attached to theflexible board and a side surface at an acute angle to the supportsurface, and side surfaces of adjacent electromagnets are able to beattached to each other by a magnetic force to cause the flexible boardto roll up.

As illustrated in FIGS. 1 and 2, a support structure 100 for supportinga flexible display screen 1 provided by the present disclosure includesa first flexible board 10 configured to be attached to the flexibledisplay screen 1; a second flexible board 20 arranged opposite to thefirst flexible board 10, in which a gap 11 is defined between the secondflexible board 20 and the first flexible board 10 and filled with anelectro-rheological fluid 12; a side board 30 coupling outer peripheriesof the first flexible board 10 and the second flexible board 20 andsealing the gap 11; a plurality of electromagnets 40 secured to thefirst flexible board 10 and located in the gap 11, in which eachelectromagnet 40 has a support surface 41 attached to the first flexibleboard 10 and a side surface 42 at an acute angle to the support surface41, and side surfaces 42 of adjacent electromagnets 40 are attached toeach other by a magnetic force to cause the first flexible board 10 toroll up.

It could be understood that the support structure 100 is applied to amobile terminal, and a side of the first flexible board 10 facing awayfrom the second flexible board 20 is attached to the flexible displayscreen 1, such that the flexible display screen 1 can be rolled up orexpanded. The mobile terminal can be a mobile phone, a tablet computer,a notebook computer or the like.

By providing the electro-rheological fluid 12 between the first flexibleboard 10 and the second flexible board 20, and securing the plurality ofelectromagnets 40 to the first flexible board 10, when the firstflexible board 10 and the second flexible board 20 are expanded, avoltage is applied to the electro-rheological fluid 12 to make theelectro-rheological fluid 12 become solid, such that theelectro-rheological fluid 12 and the electromagnets 40 together supportthe first flexible board 10, and hence the first flexible board 10exhibits a characteristic of a hard board, so as to support the flexibledisplay screen 1. When the first flexible board 10 and the secondflexible board 20 are rolled up, the voltage is revoked from theelectro-rheological fluid 12 and the plurality of electromagnets 40 areenergized to make the electro-rheological fluid 12 become liquid andmake the electromagnets 40 magnetic, such that the side surfaces 42 ofthe two adjacent electromagnets 40 are attached to each other undermagnetic attraction, and hence the first flexible board 10 and thesecond flexible board 20 are tightly rolled up together, therebyfacilitating the rolling of the flexible display screen 1. The supportstructure 100 can support the flexible display screen 1 when theflexible display screen 1 is expanded, and facilitate tight rolling andcollapse of the flexible display screen 1 when the flexible displayscreen 1 is rolled up, thereby improving user experience.

In this embodiment, the first flexible board 10 is a rectangular board.The first flexible board 10 exhibits flexibility, and can be bent freelyunder an external force. The first flexible board 10 includes a firstouter surface 101 and a first inner surface 102 arranged oppositely, andthe first inner surface 102 is oriented towards the second flexibleboard 20. When the support structure 100 is applied to the mobileterminal, the first outer surface 101 is attached to the flexibledisplay screen 1. The first inner surface 102 is densely provided withthe plurality of electromagnets 40. The plurality of electromagnets 40can be bonded to, snapped with, embedded in, or integrally provided tothe first inner surface 102. Certainly, in other embodiments, the firstflexible board 10 may be circular or in other polygonal shapes.

In this embodiment, the second flexible board 20 is a rectangular board.The second flexible board 20 has the same size as the first flexibleboard 10. The second flexible board 20 has a second outer surface 21 anda second inner surface 22 arranged oppositely. The second inner surface22 is oriented towards the first flexible board 10. There is a clearancebetween the second inner surface 22 and the electromagnets 40, so that aflow channel of the electro-rheological fluid 12 is defined between thesecond inner surface 22 and the electromagnets 40, and hence it isconvenient for the electro-rheological fluid 12 to flow in the flowchannel when the support structure 100 is bent. The second flexibleboard 20 and the first flexible board 10 are bent together to facilitateprotection of the electromagnets 40 while preventing leakage of theelectro-rheological fluid 12. The second flexible board 20 and the firstflexible board 10 can be made of the same material.

In this embodiment, the side board 30 is bonded to peripheral sides ofthe first flexible board 10 and the second flexible board 20. The sideboard 30 may be a flexible film, and the side board 30 has relativelygood ductility. When the flexible display screen 1 needs to be rolledup, the first flexible board 10 and the second flexible board 20 arebent, and hence the first flexible board 10 and the second flexibleboard 20 are displaced, resulting in deformation of the side board 30,such that the side board 30 enhances the deformation performance of thesupport structure 100. In addition, side surfaces 42 of the plurality ofelectromagnets 40 approach to each other, so that theelectro-rheological fluid 12 between the two adjacent electromagnets 40is squeezed, and with relatively good deformation performance of theside board 30, the squeezed electro-rheological fluid 12 can flow to theside board 30 to cause the side board 30 to bulge. In other embodiments,the side board is made of high elastic rubber or a high elastic carbonfiber material.

In this embodiment, the first flexible board 10, the second flexibleboard 20, and the side board 30 together form an accommodating body, andthe gap 11 forms an inner cavity of the accommodating body, such thatthe electro-rheological fluid 12 is accommodated in the accommodatingbody and thus are sealed. The electro-rheological fluid 12 can becrystallized under an energized condition, hence can be converted from aliquid state to a solid state, and finally can exhibit solid properties,such that the first flexible board 10 and the second flexible board 20are stress-supported and cannot be deformed, thereby facilitating thesupport of the flexible display screen 1. Likewise, theelectro-rheological fluid 12 can be converted from the solid state tothe liquid state under a de-energized condition, and finally exhibitliquid properties, such that the first flexible board 10 and the secondflexible board 20 are easily deformed, thereby facilitating the rollingof the flexible display screen 1.

In this embodiment, the electromagnet 40 is tapered. As animplementation, the electromagnet 40 is a frustum of square pyramid, andthe electromagnet 40 has a square cross section perpendicular to aheight direction. It should be noted that, the height direction of eachelectromagnet 40 refers to a direction perpendicular to the respectivesupport surface 41 of the electromagnet 40. The plurality ofelectromagnets 40 can be closely arranged to the first flexible board10. Specifically, since the support surfaces 41 of the two adjacentelectromagnets 40 are closely coupled, when the flexible display screen1 and the first flexible board 10 are in an expanded state, heightdirections of the two adjacent electromagnets 40 are parallel to eachother, and thus there is a clearance between the side surfaces 42 of thetwo adjacent electromagnets 40. The electro-rheological fluid 12 ispresent in that clearance, and in such a case, the electro-rheologicalfluid 12 is energized and hence exhibits solid properties, so that theside surfaces 42 of the two adjacent electromagnets 40 cannot approachto each other. In such a way, the support surfaces 41 of the pluralityof electromagnets 40 collectively support the first flexible board 10,and the first flexible board 10 can support the flexible display screen1, thereby facilitating operations on the flexible display screen 1after being expanded. Likewise, after the electro-rheological fluid 12is de-energized, the electro-rheological fluid 12 exhibits the liquidstate, such that the first flexible board 10 and the second flexibleboard 20 are rolled up under an external force, to cause the flexibledisplay screen 1 to roll up. At this time, the electro-rheological fluid12 between the two adjacent electromagnets 40 can flow, the sidesurfaces 42 of the two adjacent electromagnets 40 will approach to eachother as the first flexible board 10 is deformed, and hence theelectro-rheological fluid 12 capable of flowing is squeezed, such thatthe side surfaces 42 of the two adjacent electromagnets 40 are finallyattached together. In such a case, the two adjacent electromagnets 40are energized and hence magnetized, and the two adjacent electromagnets40 are secured together under mutual magnetic attraction. Further, theexternal force is revoked from the first flexible board 10 and thesecond flexible board 20, and the first flexible board 10 and the secondflexible board 20 can still be in a rolled-up state, so that the supportstructure 100 can keep the flexible display screen 1 in a rolled-upstate, thereby effectively reducing the space occupied by the flexibledisplay screen 1. In other embodiments, the electromagnet 40 may also bea frustum of hexagonal pyramid or a conical frustum or the like.Certainly, in other embodiments, the electromagnet 40 may also be acombination of a rectangular block and a tapered block, the supportsurface 41 of the electromagnet 40 is provided to the rectangular block,while the side surface 42 is provided to the tapered block, and theremay also be a clearance between the support surfaces 41 of the twoadjacent electromagnets 40.

Further, as illustrated in FIGS. 3 and 4, another embodiment isprovided. Different from the above embodiment, each electromagnet 40 hasa bottom surface 43 parallel to the support surface 41, and the bottomsurface 43 is at an obtuse angle to the side surface 42. The bottomsurface 43 of each electromagnet 40 is attached to the second flexibleboard 20. Specifically, in order to make the support structure 100 morestable, the bottom surface 43 of the electromagnet 40 is attached to thesecond flexible board 20, and the bottom surface 43 and the secondflexible board 20 are secured together to avoid separation of the secondflexible board 20 from the electromagnet 40, so as to prevent leakage ofthe electro-rheological fluid 12. Moreover, by attaching the bottomsurface 43 of the electromagnet 40 to the second flexible board 20, anarea of the second flexible board 20 between two adjacent electromagnets40 forms a deformable channel. When the first flexible board 10 and thesecond flexible board 20 are rolled up together, the electro-rheologicalfluid 12 between the two adjacent electromagnets 40 may be squeezed tothe deformable channel of the second flexible board 20 between the twoadjacent electromagnets 40, thereby causing the area to bulge. In such away, the squeezed electro-rheological fluid can be accommodated, toprevent the electro-rheological fluid 12 from being squeezed to theoutside of the first flexible board 10 and the second flexible board 20,i.e. to prevent the leakage.

Further, as illustrated in FIGS. 1 and 2, in an embodiment, theplurality of electromagnets 40 are coupled via a conductive cable. Inthe present embodiment, in order to energize the plurality ofelectromagnets 40 conveniently at the same time, the plurality ofelectromagnets 40 are coupled in series by using the conductive cable.Specifically, the conductive cable can include a plurality of transversewires and a plurality of longitudinal wires, each of the transversewires is provided with a positive node while each of the longitudinalwires is provided with a negative node, and each positive node and eachnegative node are correspondingly coupled to the electromagnet 40. Eachof the transverse wires is serially coupled to the plurality ofelectromagnets 40 arranged transversely, and each of the longitudinalwires is serially coupled to the plurality of electromagnets 40 arrangedlongitudinally. Thus, when the transverse wires and the longitudinalwires are energized, each electromagnet 40 receives a voltage and henceexhibits magnetic properties.

Further, the plurality of electromagnets 40 are arranged in an array onthe first flexible board 10. In the present embodiment, the plurality ofelectromagnets 40 are arranged in a rectangular array on the firstflexible board 10. Specifically, the plurality of electromagnets 40 arelongitudinally arranged along a length direction of the first flexibleboard 10, and are arranged transversely along a width direction of thefirst flexible board 10. The first flexible board 10 can be rolled up inthe width direction such that the side surfaces 42 of the plurality ofelectromagnets 40 arranged longitudinally approach to each other, or thefirst flexible board 10 is rolled up in the length direction so that theside surfaces 42 of the plurality of electromagnets 40 arrangedtransversely approach to each other.

Further, the first flexible board 10 is an elastic memory board. It canbe understood that the first flexible board 10 is in a bent state underthe action of an external force; after the external force is removed,the first flexible board 10 changes its own molecular chain from a bentstate to a stretched state by self-intermolecular stress, such that thefirst flexible board 10 is allowed to return to the expanded state, andcan drive the flexible display screen 1 to be restored to the expandedstate automatically. In other embodiments, the first flexible board mayalso be made of an elastic material such as high elastic rubber or highelastic carbon fiber.

Further, the support surface 41 of the electromagnet 40 is provided witha protrusion 411, and the first flexible board 10 is provided with agroove 13 corresponding to and fitted with the protrusion 411. In thisembodiment, the first inner surface 102 of the first flexible board 10is provided with a plurality of grooves 13 corresponding to theprotrusions 411 of the plurality of electromagnets 40. Since theprotrusion 411 is fitted in the groove 13, and the support surface 41 isattached to the first inner surface 102, the plurality of electromagnets40 and the first flexible board 10 are more stable in structure, and theplurality of electromagnets 40 can conveniently support the firstflexible board 10.

As illustrated in FIGS. 5 and 6, the present disclosure further providesa flexible display screen module 200. The flexible display screen module200 includes the support structure 100, and the flexible display screenmodule 200 also includes the flexible display screen 1. The flexibledisplay screen 1 is attached to a side of the first flexible board 10facing away from the second flexible board 20. In this embodiment, theflexible display screen 1 is an organic electroluminescent displaylayer, and the flexible display screen 1 is stacked on the supportstructure 100. Specifically, the flexible display screen 1 can bestacked on the first outer surface 101 of the first flexible board 10,and be bonded to the first outer surface 101 by glue.

Further, the flexible display screen module 200 further includes aflexible circuit board 50 which electrically couples theelectro-rheological fluid 12 and the electromagnets 40, to provide anelectrical signal to the electro-rheological fluid 12 and theelectromagnets 40. The electro-rheological fluid 12 and theelectromagnet 40 are electrically coupled by the flexible circuit board50, thereby allowing the flexible display screen module 200 to adapt tovarious mobile terminals conveniently.

As illustrated in FIGS. 7 and 8, the present disclosure further providesanother flexible display screen module 300. The flexible display screenmodule includes: a flexible display screen 310; a flexible board 320arranged opposite to the flexible display screen 310, in which a gap 311is defined between the flexible board 320 and the flexible displayscreen 310 and filled with an electro-rheological fluid 312; a sideboard 330 coupling outer peripheries of the flexible display screen 310and the flexible board 320 and sealing the gap 311; a plurality ofelectromagnets 340 secured to the flexible display screen 310 andlocated in the gap 311, in which each electromagnet 340 has a supportsurface 341 attached to the flexible display screen 310 and a sidesurface 342 at an acute angle to the support surface 341, and sidesurfaces 342 of adjacent electromagnets 340 are attached to each otherby a magnetic force to cause the flexible board 320 to roll up.

In this embodiment, the flexible display screen module 300 issubstantially identical to the flexible display screen module 200, andthe difference is that on the basis of the flexible display screenmodule 200, the first flexible board 10 is removed, and theelectromagnet 340 is directly attached to the flexible display screen310. Thus, the overall thickness of the flexible display screen module300 is reduced. Moreover, the electro-rheological fluid 312 is sealed bythe flexible display screen 310, the flexible board 320, and the sideboard 330 together, so that the overall structure of the flexibledisplay screen module 300 is simple.

As illustrated in FIG. 9, the present disclosure further provides amobile terminal 400. The mobile terminal 400 includes the flexibledisplay screen module 200 or 300. The mobile terminal 400 also includesa housing 410, and a main board 420 secured in the housing 410. Theflexible display screen module 200 or 300 is secured to the housing 410and electrically coupled with the main board 420. The mobile terminal400 can be a mobile phone, a tablet computer, a notebook computer or thelike.

For the support structure, the flexible display screen module, and themobile terminal according to the present disclosure, by providing theelectro-rheological fluid between the first flexible board and thesecond flexible board, and densely providing the plurality ofelectromagnets to the first flexible board, when the first flexibleboard and the second flexible board are expanded, a voltage is appliedto the electro-rheological fluid to make the electro-rheological fluidbecome solid, such that the electro-rheological fluid and theelectromagnets together support the first flexible board, and hence thefirst flexible board exhibits a characteristic of a hard board, so as tosupport the flexible display screen. When the first flexible board andthe second flexible board are rolled up, the voltage is revoked from theelectro-rheological fluid to make the electro-rheological fluid becomeliquid, and the plurality of electromagnets are energized to make theelectromagnets magnetic. Due to the trapezoidal shape of theelectromagnet, after the first flexible board is rolled up, the sidesurfaces of the two adjacent electromagnets approach to each other andare attached to each other under magnetic attraction, and hence thefirst flexible board and the second flexible board are tightly rolled uptogether, such that the flexible display screen is conveniently drivento roll up. The support structure can support the flexible displayscreen when the flexible display screen is expanded, and facilitate thetight rolling and collapse of the flexible display screen when theflexible display screen is rolled up, thereby improving the userexperience.

The above are some embodiments of the present disclosure. It should benoted that those skilled in the art can make improvements andmodifications without departing from the principles of the presentdisclosure, and these improvements and modifications are also within theprotection scope of the present disclosure.

What is claimed is:
 1. A flexible screen support structure, comprising:a first flexible board configured to be attached to a flexible displayscreen; a second flexible board arranged opposite to the first flexibleboard, the second flexible board and the first flexible board defining agap therebetween, and the gap being filled with an electro-rheologicalfluid; a side board coupling outer peripheries of the first flexibleboard and the second flexible board and sealing the gap; and a pluralityof electromagnets secured to the first flexible board and located in thegap, each electromagnet having a support surface attached to the firstflexible board and a side surface at an acute angle to the supportsurface, and side surfaces of adjacent electromagnets being able toattached to each other by a magnetic force to cause the first flexibleboard to roll up.
 2. The flexible screen support structure according toclaim 1, wherein the electromagnet is tapered.
 3. The flexible screensupport structure according to claim 2, wherein each electromagnetfurther has a bottom surface parallel to the support surface, and thebottom surface is at an obtuse angle to the side surface.
 4. Theflexible screen support structure according to claim 3, wherein thebottom surface is attached to the second flexible board.
 5. The flexiblescreen support structure according to claim 4, wherein the side board isa flexible board.
 6. The flexible screen support structure according toclaim 1, wherein the first flexible board is an elastic memory board. 7.The flexible screen support structure according to claim 1, wherein thesupport surface is provided with a protrusion, and the first flexibleboard is provided with a groove corresponding to and fitted with theprotrusion.
 8. A flexible display screen module, comprising a flexiblescreen support structure and a flexible display screen, the flexiblescreen support structure comprising: a first flexible board configuredto be attached to the flexible display screen, a second flexible boardarranged opposite to the first flexible board, the second flexible boardand the first flexible board defining a gap therebetween, and the gapbeing filled with an electro-rheological fluid, a side board couplingouter peripheries of the first flexible board and the second flexibleboard and sealing the gap, and a plurality of electromagnets secured tothe first flexible board and located in the gap, each electromagnethaving a support surface attached to the first flexible board and a sidesurface at an acute angle to the support surface, and side surfaces ofadjacent electromagnets being able to attached to each other by amagnetic force to cause the first flexible board to roll up; and theflexible display screen being attached to a side of the first flexibleboard facing away from the second flexible board.
 9. The flexibledisplay screen module according to claim 8, wherein the electromagnet istapered.
 10. The flexible display screen module according to claim 9,wherein each electromagnet further has a bottom surface parallel to thesupport surface, and the bottom surface is at an obtuse angle to theside surface.
 11. The flexible display screen module according to claim10, wherein the bottom surface is attached to the second flexible board.12. The flexible display screen module according to claim 11, whereinthe side board is a flexible board.
 13. The flexible display screenmodule according to claim 8, wherein the first flexible board is anelastic memory board.
 14. The flexible display screen module accordingto claim 8, wherein the support surface is provided with a protrusion,and the first flexible board is provided with a groove corresponding toand fitted with the protrusion.
 15. A flexible display screen module,comprising: a flexible display screen; a flexible board arrangedopposite to the flexible display screen, the flexible board and theflexible display screen defining a gap therebetween, and the gap beingfilled with an electro-rheological fluid; a side board coupling outerperipheries of the flexible display screen and the flexible board andsealing the gap; and a plurality of electromagnets secured to theflexible display screen and located in the gap, each electromagnethaving a support surface attached to the flexible board and a sidesurface at an acute angle to the support surface, and side surfaces ofadjacent electromagnets being able to attached to each other by amagnetic force to cause the flexible board to roll up.